HP StoreOnce B6000 Series Manual
Hp storeonce backup system concepts guide
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HP StoreOnce
Backup System Concepts Guide
Abstract
If you are new to the HP StoreOnce Backup System, read this guide before you configure your system. It describes the StoreOnce
technology and advises how to plan the workload being placed on the HP StoreOnce Backup System in order to optimize
performance and minimize the impact of deduplication, replication and housekeeping operations competing for resources.
The information in this guide is valid for both single-node and multi-node StoreOnce Backup Systems.
IMPORTANT:
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HP Part Number: EJ022-90904
Published: September 201 1
Edition: 2
The English version that is available on the web at launch may have later updates. Always check
for the most up-to-date documentation for your product.
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Table of Contents
Related Manuals for HP StoreOnce B6000 Series
Summary of Contents for HP StoreOnce B6000 Series
- Page 1 HP StoreOnce Backup System Concepts Guide Abstract If you are new to the HP StoreOnce Backup System, read this guide before you configure your system. It describes the StoreOnce technology and advises how to plan the workload being placed on the HP StoreOnce Backup System in order to optimize performance and minimize the impact of deduplication, replication and housekeeping operations competing for resources.
- Page 2 © Copyright 201 1 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.21 1 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license.
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Page 3: Table Of Contents
Contents 1 Before you start..................5 Overview..........................5 NAS targets for backup applications...................5 Virtual Tape Library targets for backup applications..............5 Comparing NAS and Virtual Tape Library targets.................6 Connecting to the HP StoreOnce Backup System................6 Multi-node systems........................6 Multi-node terminology......................7 Node..........................7 Couplet..........................7 Cluster...........................7 VIF..........................7 B6000 Management Console...................7 CLI..........................7 Failover/Resilience ......................8... - Page 4 Replication and Virtual Tape Devices..................23 Preparing for replication.....................23 Replication and firewalls.....................23 Restricting access to replication sources.................23 HP Replication Manager (HP D2D4xxx Series only)..............23 Replication concepts and terminology..................24 Replication elements......................24 Fan OUT..........................25 Fan IN..........................26 Job concurrency.........................29 Replication deployment strategies.....................31 Replication Licensing.......................33 Before you start.........................34 Seeding the Target Appliance....................34 Seeding the Replication Target Appliance................34...
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Page 5: Before You Start
1 Before you start In this chapter: Overview (page 5) NAS targets for backup applications (page 5) Virtual Tape Library targets for backup applications (page 5) Comparing NAS and VTL targets (page 6) Connecting to the HP StoreOnce Backup System (page 6) Multi-node systems (page 6) For more information (page 9) Overview... -
Page 6: Comparing Nas And Virtual Tape Library Targets
Comparing NAS and Virtual Tape Library targets The following table summarizes some of the differences between NAS targets and Virtual Tape devices. Table 1 Comparing NAS targets and Virtual Tape devices Virtual tape devices NAS targets Acts as a staging post to tape because backups are in tape Enables use of backup application functionality that is only format;... -
Page 7: Multi-Node Terminology
Multi-node terminology The following terminology explains some of the concepts that are particularly relevant to multi-node implementations. Node A node is one of the pair of servers that, together with the array storage, make up a couplet. The two nodes are directly connected in failover pairs. If one node fails, the other node can still access the storage from the failed node, because there are storage paths from each node to both controllers of both arrays. -
Page 8: Failover/Resilience
Failover/Resilience The HP B6000 Backup System is designed to provide resilience, as follows. Nodes are connected as fault tolerant failover pairs System hardware is designed with no single point of failure resulting in a highly resilient datapath to system data storage Proven RAID 6 technology reduces the risk of data loss due to disk failure in the data storage Dual power supplies are included as standard Service set... -
Page 9: For More Information
For more information Separate chapters in this guide provide more background information about VTL and NAS devices and the specifications that are supported. For information about using the Web Management Interface to configure and monitor devices, refer to the HP StoreOnce Backup System user guide. For information about using the Command Line Interface commands, refer to the HP StoreOnce Backup System CLI reference guide. -
Page 10: Virtual Tape Devices
2 Virtual Tape Devices In this chapter: Overview (page 10) Emulation types (page 10) Creating and configuring Virtual Tape Devices (page 11) VTL devices on Fibre Channel (page 13) VTL devices on an Ethernet network (not HP B6000) (page 14) Overview Virtual Tape Devices are backup targets on the HP StoreOnce Backup System to which the backup application on the hosts write data. -
Page 11: Creating And Configuring Virtual Tape Devices
If you have selected D2DBS Generic for the Library Emulation Type, you will be able to select Ultrium VT for the drive emulation. This is a generic Ultrium device which is clearly identifiable as virtual. Backup application support for Ultrium VT is reasonable, but not quite as complete as the D2DBS library type, so it is not possible to use it with all backup software. -
Page 12: Limitations On The Number Of Devices
Tape spanning is possible, but not recommended. It is desirable to create cartridges with a size greater than a full backup, so that the backup fits on one cartridge. However, cartridge formats and sizes are present mainly to assist the user in identification within a backup application and for offloading to physical tape. -
Page 13: Flexible Emulation
Table 5 Maximum number of libraries and drives per G1 appliance HP D2D4004 HP D2D2502i HP D2D2503i HP D2D2504i /4009 HP D2D41 12 Max libraries Max drives per library Max slots per library (D2DBS) NOTE: It is only possible to exceed the maximum physical limitation when configuring the HP D2D41 12 Backup System. -
Page 14: Zoning
A direct attach topology is implemented by connecting the HP StoreOnce Backup System directly to a Host Bus Adapter (HBA). In this configuration the Fibre Channel private loop protocol must be used. The preferred topology for the HP StoreOnce Backup System is switched fabric using NPIV (N_Port ID Virtualisation). - Page 15 The following figure shows a configuration with a single host. The Installation wizard has been run on Host 1. The HP StoreOnce Backup System automatically generates a library for the host. The user may specify the number of slots during installation. Figure 1 Device configuration with one host By default, only one device is visible to the host, the iSCSI library that has been configured for it during installation.
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Page 16: Backup Applications And Replication Target Libraries
Backup applications and Replication Target libraries Replication Target libraries are not normally visible to the host, but you can configure devices to make them visible to backup applications. There are two occasions when it may be useful to make a target library visible to the backup application on the host. To confirm that replication is working correctly and check the integrity of the replicated backup by doing a test restore To perform manual tape copy jobs to a tape device on the network using the backup application... -
Page 17: Nas Shares
3 NAS shares In this chapter: Operating system support (page 17) Backup application support (page 17) Maximum number of NAS shares (page 17) Maximum number of files per NAS share and appliance (page 17) Maximum number of users per CIFS share (page 18) Maximum number of hosts per NFS share (page 18) NOTE: It is important to understand that the HP StoreOnce network share is intended to be used... -
Page 18: Maximum Number Of Users Per Cifs Share
Backup applications generally create a small number of additional files during a backup job in order to store configuration details and catalog entries. Some of these small files will generally be updated throughout the backup process and, in most instances, these files will be below the deduplication threshold. -
Page 19: Data Deduplication
4 Data deduplication In this chapter: What is data deduplication? (page 19) Data deduplication and the HP StoreOnce Backup System (page 19) Tape rotation example with data deduplication (page 20) What is data deduplication? Data deduplication is a process that compares blocks of data being written to the backup device with data blocks previously stored on the device. -
Page 20: Benefits Of Hp Storeonce Deduplication
Benefits of HP StoreOnce deduplication The main benefit is that it is possible to store more data and retain data for longer on each device. The host using the device has access to a greater depth of historical data that would otherwise have been archived offline. - Page 21 Table 9 Data deduplication savings, example 1 (continued) 3rd daily incremental backup 50 GB 5 GB 4th daily incremental backup 50 GB 5 GB 5th daily incremental backup 50 GB 5 GB 2nd weekly full backup 500 GB 25 GB 3rd weekly full backup 500 GB 25 GB...
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Page 22: Replication
5 Replication NOTE: When considering replication you are likely to be synchronizing data between different models of HP StoreOnce Backup Systems. The examples in this section are not specific to a particular model of HP StoreOnce Backup System. In this chapter: What is an appliance (page 22) Replication overview (page 22) HP Replication Manager (page 23) -
Page 23: Replication And Virtual Tape Devices
Once you have set up a replication configuration between Source and Target HP StoreOnce Backup Systems, it is initiated automatically whenever a backup takes place. NOTE: If the replication Source Appliance fails and goes offline whilst it was performing a NAS replication job, the replication target share appliance may be left in an inconsistent state. -
Page 24: Replication Concepts And Terminology
Manager, administrators create, manage, and remove groups of devices; and establish and control user and administrator access to the groups and devices. Replication Manager allows administrators and users to review the status of the groups and devices to which they have access, either to ensure that replication is happening successfully and on schedule, or to respond when there are replication operation errors. -
Page 25: Fan Out
Figure 5 Replication elements, using libraries 1. Host backing up 2. Source Appliance 3. Target Appliance 4. Non-Replicating Device (Share or Library) 5. Replication Source Device (Share or Library) 6. Replication Target Device (Share or Library) When configuring replication on complex sites, for example many Remote Sites into a Data Center, care must be taken when planning how appliances, shares and libraries will be replicated. -
Page 26: Fan In
Each HP D2D 4004/4009 or 4106/41 12 Series Source Appliance can replicate to up to four Target Appliances. Each HP D2D 4312 Series Source Appliance can replicate to up to eight Target Appliances. Each HP D2D 4324 Series Source Appliance can replicate to up to eight Target Appliances. Figure 6 Fan OUT example for HP D2D4000/4100/4300 Series HP D2D250x Series Each HP D2D 250x Series Source Appliance can replicate to up to two Target Appliances. - Page 27 HP D2D250x Series Each HP D2D2502 Target Appliance can support up to four Source Appliances. Each HP D2D2503 Target Appliance can support up to six Source Appliances. Each HP D2D2504 Target Appliance can support up to eight Source Appliances. Each share or library on the Target Appliance must be uniquely mapped to one share or library on a Source Appliance.
- Page 28 NOTE: The following example illustrates how an HP D2D4000/4100 or 4300 Series Appliance at the Data Center can easily support 20 libraries. However, if NAS shares were being used, only the HP D2D4100 and 4300 Series would be able to support all 20 NAS shares, because of the one-to-one mapping.
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Page 29: Job Concurrency
Figure 9 HP D2D4xxx series Fan IN example, using libraries Fan IN and slot mapping: You may not want to replicate all the slots in a library. For example, if you have weekly full backups and daily incremental backups, you may decide to only replicate the slots that contain the full backups. - Page 30 Table 10 Fan In, Fan Out and job concurrency rules, B6000 products Per node (couplet) maximum couplets (4) Appliance Fan Out Maximum number of Target 8 (16) appliances supported by one Source appliance Appliance Fan In Maximum number of Source 48 (96) appliances supported by one Target appliance...
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Page 31: Replication Deployment Strategies
Table 12 Fan In, Fan Out and job concurrency rules, G1 products (continued) Appliance Fan In Maximum number of D2D2502: 4 Source appliances D2D2503: 6 supported by one D2D2504: 8 Target appliance Library Fan Out Maximum number of All: 1 Target libraries to which a Source library may be mapped... -
Page 32: Active To Active Example
Active to Active example In the following example there are again two offices, each with an HP StoreOnce Backup System. The HP StoreOnce Backup System in Office A is being used by the host server for backup and restore and all Replication-Source libraries and shares are being replicated to matching Replication-Target libraries and shares on the HP StoreOnce Backup System in Office B. -
Page 33: Replication Licensing
Figure 12 Many to one replication example Replication Licensing The Replication License is a single software license; it is unique to a single HP StoreOnce Backup System and is required on every appliance that will be used as a Replication Target. If you wish to replicate data to multiple HP StoreOnce Backup Systems, you require a separate license for each target appliance, appropriate to the model type, and must repeat the activation process for each HP StoreOnce Backup System. -
Page 34: Before You Start
Before you start To activate your license you must first obtain a permanent License To Use (LTU) from the HP Licensing website and then use the Web Management Interface to apply the LTU, activate the replication feature and complete the licensing process. The HP Licensing website will ask you for: The HP entitlement order number for the HP StoreOnce Replication license (found on the entitlement certificate) Single-node systems: The unique HP StoreOnce Backup System serial number (found on the... -
Page 35: Recovering A Source Appliance
Host backs up to a Non Replicating NAS share on the Source Appliance. Host maps to the NAS share on the HP StoreOnce Backup System and uses a file management application (such as Windows Explorer) to locate files and copy them to a USB disk attached to the host. - Page 36 Figure 14 Reverse replication scenario New host server and StoreOnce Backup System hardware has been purchased and installed and the administrator now wants to recover data to the StoreOnce Backup System and then restore to the host server. Before the failure a mapping existed between a Source Share or Library on the remote site StoreOnce Backup System and a Target Share or Library on the Data Center StoreOnce Backup System.
- Page 37 not installed a new StoreOnce Backup System and is going to recover data directly to the server from the Data Center StoreOnce Backup System appliance over the WAN (which will take a long time). The target is co-located onto the remote site and connected via iSCSI (G2 and G1 only), FC or NAS New server hardware has been purchased and installed and the administrator now wants to recover data to the server.
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Page 38: Housekeeping
6 Housekeeping In this chapter: What is housekeeping? (page 38) What effect does housekeeping have on performance (page 38) Why is housekeeping important? (page 38) What do I need to do? (page 38) What is housekeeping? If data is deleted from the StoreOnce Backup System (e.g a virtual cartridge is overwritten or erased), any unique chunks will be marked for removal, any non-unique chunks are de-referenced and their reference count decremented. -
Page 39: For More Information
schedule and then overwrite the tape cartridges when the virtual library cartridge data expires or when the data is no longer useful. You can also use the Web Management Interface to monitor housekeeping and configure blackout windows so that it does not interfere with backup and replication jobs. See the HP StoreOnce Backup System user guide for details. -
Page 40: Performance
7 Performance Optimizing peformance In order to optimize the performance of your system and minimize the likelihood of StoreOnce operations competing for processing resources it is important to understand the complete workload being placed on the HP StoreOnce Backup System. The following is a very brief overview of factors to be considered. -
Page 41: To Be Avoided
To be avoided Do not delete and eject cartridges Avoid housekeeping jobs during backup Avoid running a lot of small incremental backups To be avoided... -
Page 42: Glossary
Glossary Autoloaders An autoloader is a Virtual Tape Device that has a single tape drive and multiple storage slots. (A library has multiple tape drives.) Each storage slot contains a cartridge that can be allocated to a specific backup task; for example, one cartridge can hold Monday's data, another can hold Tuesday's data, and so on. - Page 43 as a StoreOnce device. It is the most flexible emulation type available; however, backup application support varies by software vendor. Fibre Channel (FC) Fibre Channel (FC) supports network connectivity over fibre optic cabling or copper wiring. FC has a different set of standards and network connection protocol to Ethernet and different configuration requirements.
- Page 44 NAS Shares Devices on HP StoreOnce Backup Systems may be configured as Virtual Tape devices or as NAS (Network Attached Storage) targets for backup applications. NAS target devices on an HP StoreOnce Backup System provide network file share access that is optimized for backup to disk and are referred to as NAS Shares in the Web Management Interface.
- Page 45 HP D2D4312: 12 TB (12 x 1 TB). Up to three additional shelves may be connected to the unit, which increases the total capacity to 48 TB (48 x 1 TB) HP D2D4324: 24 TB (12 x 2 TB). Up to three additional shelves may be connected to the unit, which increases the total capacity to 96 TB (48 x 2 TB) However, in order to ensure a high level of data integrity, the disks use RAID protection.
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Page 46: About This Guide
About this guide This guide provides conceptual information about the following HP StoreOnce Backup Systems: G3: HP B6000 StoreOnce Backup System G2: HP D2D4324/4312, HP D2D41 12/4106 and HP D2D2502/2504 Backup System G1: HP D2D41 12, HP D2D4004/4009 and HP D2D2502/2503/2504 Bacjkup System Intended audience This guide is intended for users who install, operate and maintain the HP StoreOnce Backup System. -
Page 47: Hp Technical Support
CAUTION: Indicates that failure to follow directions could result in damage to equipment or data. IMPORTANT: Provides clarifying information or specific instructions. NOTE: Provides additional information. HP technical support For worldwide technical support information, see the HP support website: http://www.hp.com/support Before contacting HP, collect the following information: Product model names and numbers Technical support registration number (if applicable) -
Page 48: Documentation Feedback
http://www.hp.com/go/storage http://www.hp.com/service_locator http://www.hp.com/support/manuals http://www.hp.com/support/downloads Documentation feedback HP welcomes your feedback. To make comments and suggestions about product documentation, please send a message to storagedocs.feedback@hp.com. All submissions become the property of HP. -
Page 49: Index
Index with replication, 23, flexible emulation, audience, performance vs dedupe ratio, B6000 Management Console, glossary, B6000 network guidelines, backup targets, help obtaining, capacity license, host CIFS, definition, 10, CIFS share fibre channel, maximum users, housekeeping, CLI, cluster, technical support, comparing NAS and VTL, HP 1x8 G2 Autoloader, compression deduplication,... - Page 50 non-replicating library, VIF, performance comparing with NAS, and housekeeping, creating and configuring devices, don'ts, limitations on numbers of, optimizing, replication, performance vs dedupe ratio, VTL targets, permissions source appliance, websites customer self repair, recovery HP , replication, HP Subscriber's Choice for Business, related documentation, product manuals, replication...